I am overhauling a 2.0L for a 190 Spyder. The existing pistons look newish from the rings down and are stamped "020" on top. I assumed 2nd oversize, but the machine shop that has the pistons and rods currently says that he has measured them as standard. There is also no ring ridge on any cylinder. One piston, however has part of the ridge missing from between two of the ringlands, so it looks like I need a piston. It otherwise looks okay, and does not appear to be a fresh break.
Thanks
Dennis
Thanks
Dennis